<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>refs</title>
    <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
    <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
    <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.js"></script>
</head>
<body>
    <div id="example"></div>
</body>
<script type="text/babel">
    class App extends React.Component {
        constructor(props) {
            super(props)
            this.state = {
                message: 'bullent'
            }
            this.change = this.change.bind(this)
        }
        change(event) {
            let message = event.target.value
            this.setState({message})
        }
        render() {
            return (
                <div>
                    <input type="text" value={this.state.message} onChange={this.change} />
                    <p>{this.state.message}</p>
                </div>
            )
        }
    }

    ReactDOM.render(<App />, document.getElementById('example'));
</script>
</html>